參數(shù)資料
型號(hào)： SN74CBT6845CDBQR
廠商： TEXAS INSTRUMENTS INC
元件分類： 總線收發(fā)器
英文描述： CBT/FST/QS/5C/B SERIES, OCTAL 1-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝： PLASTIC, SSOP-20
文件頁數(shù)： 17/21頁
文件大?。?/td> 791K
代理商： SN74CBT6845CDBQR
SN74CBT6845C
8BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS
5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION
SCDS140 OCTOBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIK
Control inputs
VCC = 4.5 V,
IIN = 18 mA
1.8
V
VIKU
Data inputs
VCC = 5 V,
0 mA
> II ≥ 50 mA,
VIN = VCC or GND,
Switch OFF
2
V
VO(USP)
VCC = BIASV = 5 V,
II = 10 mA,
VIN = VCC or GND,
Switch OFF
3
V
VO
B port
VCC = 0 V,
BIASV = Vx,
IO = 0
Vx 0.1
Vx
V
IIN
Control inputs
VCC = 5.5 V,
VIN = VCC or GND
±1
A
IO
B port
VCC = 4.5 V,
BIASV = 2.4 V,
VO = 0,
Switch OFF,
VIN = VCC or GND
0.25
mA
IOZ§
VCC = 5.5 V,
VO = 0 to 5.5 V,
VI = 0,
Switch OFF,
VIN = VCC or GND
±10
A
Ioff
VCC = 0,
VO = 0 to 5.5 V,
VI = 0
10
A
ICC
VCC = 5.5 V,
II/O = 0,
VIN = VCC or GND,
Switch ON or OFF
3
A
ICC
Control inputs
VCC = 5.5 V,
One input at 3.4 V,
Other inputs at VCC or GND
2.5
mA
Cin
Control inputs
VIN = 3 V or 0
4
pF
Cio(OFF) A port
VI/O = 3 V or 0,
Switch OFF,
VIN = VCC or GND
5.5
pF
Cio(ON)
VI/O = 3 V or 0,
Switch ON,
VIN = VCC or GND
13.5
pF
VCC = 4 V,
TYP at VCC = 4 V
VI = 2.4 V,
IO = 15 mA
8
12
ron#
VI = 0
IO = 64 mA
3
6
ron#
VCC = 4.5 V
VI = 0
IO = 30 mA
3
6
VCC = 4.5 V
VI = 2.4 V,
IO = 15 mA
5
10
VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.
All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
VO(USP) = A-port undershoot static protection.
§ For I/O ports, the parameter IOZ includes the input leakage current.
This is the increase in supply current for each input that is at the specified voltage level, rather than VCC or GND.
# Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is determined by
the lower of the voltages of the two (A or B) terminals.
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
PARAMETER
TEST
CONDITIONS
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4 V
VCC = 5 V
± 0.5 V
UNIT
PARAMETER
CONDITIONS
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
UNIT
tpd||
A or B
B or A
0.24
0.15
ns
tPZH
BIASV = GND
OE
A or B
5.2
1.5
4.8
ns
tPZL
BIASV = 3 V
OE
A or B
5.2
1.5
4.8
ns
tPHZ
BIASV = GND
OE
A or B
4.9
1.5
5.3
ns
tPLZ
BIASV = 3 V
OE
A or B
4.9
1.5
5.3
ns
|| The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
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